Scientific research and development: the largest companies in Hainaut
As of 12 Nov 2026, 89 companies in Scientific research and development (NACE 72) in Hainaut publish total assets in recent accounts (financial years 2023 to 2026). The top 10 account for €333.3m, out of €458.9m for all of them; median total assets are 642,094 €. TotalEnergies OneTech Belgium leads with €116.7m (financial year 2025).
Top 50 · Scientific research and development · Hainaut
Ranked by total assets in the latest filed accounts. This is a size criterion, not an assessment.
Ranking based on each company's own annual accounts (statutory, not consolidated): a subsidiary and its parent appear separately, and the ranking differs from lists based on consolidated group accounts.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Scientific research and development across Belgium → All sectors · Hainaut →
Other sectors · Hainaut
- 01 Crop and animal production, hunting and related service activities714
- 02 Forestry and logging56
- 08 Other mining and quarrying25
- 10 Manufacture of food products432
- 11 Manufacture of beverages73
- 13 Manufacture of textiles62
- 14 Manufacture of wearing apparel35
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials102
- 17 Manufacture of paper and paper products22
- 18 Printing and reproduction of recorded media147
- 20 Manufacture of chemicals and chemical products92
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations57
- 22 Manufacture of rubber and plastic products64
- 23 Manufacture of other non-metallic mineral products174
- 24 Manufacture of basic metals58
- 25 Manufacture of fabricated metal products, except machinery and equipment481
- 26 Manufacture of computer, electronic and optical products35
- 27 Manufacture of electrical equipment45
- 28 Manufacture of machinery and equipment n.e.c.99
- 29 Manufacture of motor vehicles, trailers and semi-trailers21
- 31 Manufacture of furniture64
- 32 Other manufacturing108
- 33 Repair, maintenance and installation of machinery and equipment199
- 35 Electricity, gas, steam and air conditioning supply78
- 37 Sewerage16
- 38 Waste collection, recovery and disposal activities117
- 39 Remediation activities and other waste management service activities10
- 41 Construction of residential and non-residential buildings1,392
- 42 Civil engineering146
- 43 Specialised construction activities3,558
- 46 Wholesale trade2,488
- 47 Retail trade4,229
- 49 Land transport and transport via pipelines675
- 50 Water transport17
- 51 Air transport12
- 52 Warehousing, storage and support activities for transportation161
- 53 Postal and courier activities56
- 55 Accommodation198
- 56 Food and beverage service activities2,152
- 58 Publishing activities71
- 59 Motion picture, video and television programme production, sound recording and music publishing activities115
- 60 Programming, broadcasting, news agency and other content distribution activities14
- 61 Telecommunication45
- 62 Computer programming, consultancy and related activities1,357
- 63 Computing infrastructure, data processing, hosting and other information service activities119
- 64 Financial service activities, except insurance and pension funding1,132
- 65 Insurance, reinsurance and pension funding, except compulsory social security29
- 66 Activities auxiliary to financial services and insurance activities788
- 68 Real estate activities3,552
- 69 Legal and accounting activities1,511
- 70 Activities of head offices and management consultancy2,584
- 71 Architectural and engineering activities; technical testing and analysis1,007
- 73 Activities of advertising, market research and public relations543
- 74 Other professional, scientific and technical activities304
- 75 Veterinary activities179
- 77 Rental and leasing activities249
- 78 Employment activities62
- 79 Travel agency, tour operator and other reservation service and related activities93
- 80 Investigation and security activities44
- 81 Services to buildings and landscape activities525
- 82 Office administrative, office support and other business support activities651
- 85 Education436
- 86 Human health activities4,824
- 87 Residential care activities325
- 88 Social work activities without accommodation176
- 90 Arts creation and performing arts activities149
- 91 Libraries, archives, museums and other cultural activities21
- 92 Gambling and betting activities19
- 93 Sports activities and amusement and recreation activities349
- 94 Activities of membership organisations91
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles372
- 96 Personal service activities628
Municipalities with the most companies in the sector · Hainaut
- 6041 Charleroi (Gosselies)33
- 7000 Mons6
- 7911 Frasnes-lez-Anvaing (Buissenal, Frasnes-Lez-Buissenal, Hacquegnies, …)4
- 7181 Seneffe (Arquennes, Familleureux, Feluy, …)3
- 7503 Tournai (Froyennes)3
- 7850 Enghien (Marcq, Petit-Enghien)3
- 6043 Charleroi (Ransart)2
- 6110 Montigny-le-Tilleul2
- 6534 Thuin (Gozée)2
- 7050 Jurbise (Erbaut, Erbisoeul, Herchies, …)2
- 7800 Ath (Lanquesaint)2
- 7822 Ath (Ghislenghien, Isières, Meslin-L'evêque)2
Frequently asked questions
Which is the largest company in Scientific research and development in Hainaut?
By total assets, it is TotalEnergies OneTech Belgium (€116.7m, financial year 2025).
How many companies in Scientific research and development in Hainaut are ranked?
89 out of 91 active companies in the sector with their registered office in the area: those whose latest accounts are less than 3 years old.
Why does this ranking differ from other lists?
It uses each company's annual accounts as filed with the National Bank, not consolidated group accounts. A holding, a subsidiary or a purchasing entity can therefore appear separately. Only companies whose latest accounts are less than 3 years old are ranked.
Analyse companies · Hainaut
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Open the full file →Active companies (legal entities) that have filed at least one set of annual accounts, based on the Crossroads Bank for Enterprises and the National Bank of Belgium. The sector is the main activity in the register; the municipality is that of the registered office. Data updated on 12 Nov 2026.